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@article{MS_1966__113_1_a7, author = {{\CYRI}.{\CYRN}. {\CYRP}{\cyra}{\cyrk}}, title = {{\CYRO} {\cyrk}{\cyro}{\cyrr}{\cyrn}{\cyrya}{\cyrh} {\cyri} {\cyri}{\cyrn}{\cyrt}{\cyre}{\cyrr}{\cyrv}{\cyra}{\cyrl}{\cyra}{\cyrh} {\cyrz}{\cyrn}{\cyra}{\cyrk}{\cyro}{\cyrp}{\cyro}{\cyrs}{\cyrt}{\cyro}{\cyrya}{\cyrn}{\cyrs}{\cyrt}{\cyrv}{\cyra} {\cyrs}{\cyru}{\cyrm}{\cyrm} {\cyrn}{\cyre}{\cyrk}{\cyro}{\cyrt}{\cyro}{\cyrr}{\cyrery}{\cyrh} {\cyrt}{\cyrr}{\cyri}{\cyrg}{\cyro}{\cyrn}{\cyro}{\cyrm}{\cyre}{\cyrt}{\cyrr}{\cyri}{\cyrch}{\cyre}{\cyrs}{\cyrk}{\cyri}{\cyrh} {\cyrr}{\cyrya}{\cyrd}{\cyro}{\cyrv}}, journal = {Matemati\v{c}eskij sbornik}, pages = {83--95}, publisher = {mathdoc}, volume = {113}, number = {1}, year = {1966}, zbl = {0171.31605}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MS_1966__113_1_a7/} }
И.Н. Пак. О корнях и интервалах знакопостоянства сумм некоторых тригонометрических рядов. Matematičeskij sbornik, Tome 113 (1966) no. 1, pp. 83-95. http://geodesic.mathdoc.fr/item/MS_1966__113_1_a7/